Hummingbird Tetra (Trochilocharax ornatus) Care Guide
An extremely rare and delicate nano tetra from South American blackwater streams. Nearly transparent with scattered dark spots and a faint iridescence, males develop extended dorsal and anal fin rays.…
Compiled by Aquairi from published sources · Published · Updated
Overview
Trochilocharax ornatus is a species in the family Characidae. An extremely rare and delicate nano tetra from South American blackwater streams. Nearly transparent with scattered dark spots and a faint iridescence, males develop extended dorsal and anal fin rays. One of the world's smallest fish, it demands pristine water conditions, very soft acidic water, and live or finely crushed foods. A true challenge for experienced nano enthusiasts.
Taxonomy
- Family: Characidae
- Genus: Trochilocharax
- Scientific name: Trochilocharax ornatus
- Other names: Trochilocharax ornatus
- Origin: South America
Habitat
Native to the upper Amazon basin of Peru. Inhabits soft, acidic, slow-moving forest streams. A diminutive, translucent characin named for its hovering swimming style; the species was described to science only in 2006.
Tank requirements
- Minimum tank volume: 20 L
- Temperature: 23-27 °C
- pH: 3.5-5.5
- GH: 0-3 °dGH
- Water flow: low
- Adult size: 1.5-2 cm
- Lifespan: 1-3 years
- Recommended group size: ≥ 8
- Difficulty: advanced
Diet
Classified as omnivore. Recommended feeding frequency: 2-3x daily. In captivity, offer a varied diet appropriate to the species — quality prepared foods supplemented with frozen or live items of suitable size.
Compatibility
- Temperament: peaceful
- Swimming level: middle
- Compatible tank mates: Other Boraras species, Pygmy Corydoras, Small shrimp
- Avoid with: Almost all other fish, Strong water flow, Hard water species
Breeding
- Breeding strategy: egg-scatterer
- Breeding difficulty: advanced
Hummingbird Tetra Breeding Guide
Overview
Trochilocharax ornatus is a minute characid from blackwater tributaries near Iquitos in Loreto, Peru, where the water is clear, tannin-stained and acidic with negligible hardness. It is an advanced breeding subject: documented breeding exists, but the detailed spawning process is poorly recorded, and it apparently practises internal fertilisation, with both sexes possessing distinctive genital papillae.
Sexing
Males are larger and more intensely coloured, develop extended fins, and possess a pouch scale on the caudal peduncle. Females may appear rounder when gravid. The presence of genital papillae in both sexes reflects the species' internal-fertilisation strategy.
Conditioning
Maintain the fish in very soft, acidic blackwater of the type it inhabits in the wild. Reported parameters are a temperature of 20-28 degrees Celsius, pH 4.0-6.5 and low hardness, with acidic conditions of negligible carbonate hardness and very low general hardness required. Feed live or finely crushed foods to keep these tiny fish in condition.
Breeding Setup
A small, mature aquarium reproducing blackwater conditions is appropriate, and tanks smaller than the standard maintenance footprint can be used. A substrate of sand with submerged branches and leaf litter mirrors the natural habitat and supports the microfauna that small fry depend on.
Spawning Behavior & Trigger
Because of the internal-fertilisation strategy, small numbers of fry may start to appear without deliberate intervention in a mature, well-planted tank held at the correct parameters. The consulted source does not detail an explicit spawning trigger, egg deposition pattern or clutch size, so these are omitted.
Egg & Fry Care
Specific incubation times, hatch rates and a defined fry-feeding protocol are not documented in the consulted source. In practice, a mature blackwater aquarium rich in microorganisms offers the best chance of fry surviving unaided; precise figures should not be invented.
Common Challenges
The extreme demands for pristine, very soft, acidic water and the fish's small size make this one of the most difficult nano tetras to maintain, let alone breed. The lack of documented spawning detail means breeders are largely reliant on creating ideal conditions and observing for incidental fry. Reproducing the natural biotope helps: in the wild near Iquitos the fish inhabits clear, tannin-stained, acidic blackwater of negligible hardness over substrates of sand, mud, submerged branches and leaf litter, and a mature aquarium built on those elements supports both the adults and any fry that appear. The male's caudal-peduncle pouch scale and the genital papillae of both sexes are useful confirmation that a group contains both sexes before conditions are fine-tuned.